Food Availability and Stomach Content of Fish Populations in Semenyih Reservoir, Malaysia

Food Availability and Stomach Content of Fish Populations in Semenyih Reservoir, Malaysia

This study was done to evaluate the food availability and stomach content of fish populations in Semenyih Reservoir, Malaysia. Samples were collected at monthly intervals from November 1998 to October 1999. Fish specimens were collected from twelve stations at the shallow littoral zone of the res...

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Main Author: Dizon Peralta, Eduardo
Format: Thesis
Language:English
English
Published: 2004
Subjects:
Fish populations - Selangor - Semenyih - Case studies
Online Access:http://psasir.upm.edu.my/id/eprint/6124/1/FP_2004_9.pdf
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spelling my-upm-ir.61242023-10-11T01:57:42Z Food Availability and Stomach Content of Fish Populations in Semenyih Reservoir, Malaysia 2004-12 Dizon Peralta, Eduardo This study was done to evaluate the food availability and stomach content of fish populations in Semenyih Reservoir, Malaysia. Samples were collected at monthly intervals from November 1998 to October 1999. Fish specimens were collected from twelve stations at the shallow littoral zone of the reservoir using various sizes of gill nets for the investigation of fish species inhabiting the reservoir and for the examination of the gut content. A total of 1,469 fish were collected from the Reservoir throughout the study. Seven species belonging to seven different families were identified. Fish community consisted of Mystacoleocus marginatus C&V (sia), Hampala macrolepidota van Hasselt (sebarau) Cyclochelichthys apogon C&V (merah mata), Osteochilus hasselti C&V (terbul), Oreochromis mossambicus Peters (tilapia), Oxyleotris marmorafus Bleeker (Ketutu), and Mystus nemurus C&V (baung). Mystacoleocus marginatus was the most dominant species, comprising 64.6% of the total number of fish sampled, followed by H. macrolepidota (24.8%), C. apogon (4.2%), 0. hasseltii (2.6%), 0. mossambicus (1.4%) 0. marmoratus (1.3%), and M. nemurus (1 .I%). Composition and frequency of occurrence of food items iii have been studied. Phytoplankton, insects and zooplankton were found to be the main food items consumed of different fish species in the reservoir. While the least food items were mollusks, juvenile fish and crustaceans. Mystacoleocus marginatus, Cyclochelichthys apogon and Oreochromis mossambicus were largely omnivore at the time they were analyzed. While Hampala macrolepidota, Osteochilus hasseltii, Oxyleotris marmoratus and Mystus nemurus were highly carnivorous at the time they were analyzed. The phytoplankton community was composed of six different groups, (chlorophytes, cyanophytes, bacillariophytes, crysophytes, euglenoids and dinoflagellates) with a mean total density of 20.41 X lo4 cells ml-I. Among the six groups, chlorophytes was the most dominant with a mean density of 64,806.40 cells ml-I, followed by bacillariophytes (51,836.28 cells ml-I); cyanophytes (48,916.48 cells d l ) ; dinoflagellates (24,943.25 cells ml-I); crysophytes (1 1,387.68 cells ml-I) and euglenoids (2,189.59 cells ml-I). On the other hand, the zooplankton community consisted of three groups, namely, copepods, cladocerans and rotifers. Zooplankton was dominated by copepods with a total density of 2,701.27 organisms I", followed by rotifers (2,297.40 organisms I-') and cladocerans (7,16.47 organisms I-'). The macrobenthos of Semenyih Reservoir was composed of mollusks, annelids and chironomids, with a mean total density of 13,658.33 organisms/m2. Among these groups, mollusks were the most dominant with a mean density of 11,525.17 organisms/m2; followed by chironomids (1,599.88 organisms/m2) and annelids (533.29 organisms/m2). Physico-chemical and biological parameters of Semenyih Reservoir were also studied. Temperature, dissolved oxygen, secchi disk visibility and pH values range from 27.55-30.00 OC, 6.63-7.33 mg I-'; 50.60 - 99.80 cm; and 6.96 - 7.84, respectively. Nitrate-nitrogen, phosphate-phosphorous, silica and ammonia-nitrogen ranges from 0.09 mg 1-I to 0.15 mg I-', 2.71-5.26 mg I'', 0.2-0.3 mg I-' and 0.06 - 0.24 mg I-' respectively. One concluding sentence about the fish population, Semenyih Reservoir was a mesotrophic body of water. Fish populations - Selangor - Semenyih - Case studies 2004-12 Thesis http://psasir.upm.edu.my/id/eprint/6124/ http://psasir.upm.edu.my/id/eprint/6124/1/FP_2004_9.pdf text en public masters Universiti Putra Malaysia Fish populations - Selangor - Semenyih - Case studies Faculty Agriculture Abdul Satar, Mustafa Kamal English
institution Universiti Putra Malaysia
collection PSAS Institutional Repository
language English
English
advisor Abdul Satar, Mustafa Kamal
topic Fish populations - Selangor - Semenyih - Case studies
spellingShingle Fish populations - Selangor - Semenyih - Case studies


Dizon Peralta, Eduardo
Food Availability and Stomach Content of Fish Populations in Semenyih Reservoir, Malaysia
description This study was done to evaluate the food availability and stomach content of fish populations in Semenyih Reservoir, Malaysia. Samples were collected at monthly intervals from November 1998 to October 1999. Fish specimens were collected from twelve stations at the shallow littoral zone of the reservoir using various sizes of gill nets for the investigation of fish species inhabiting the reservoir and for the examination of the gut content. A total of 1,469 fish were collected from the Reservoir throughout the study. Seven species belonging to seven different families were identified. Fish community consisted of Mystacoleocus marginatus C&V (sia), Hampala macrolepidota van Hasselt (sebarau) Cyclochelichthys apogon C&V (merah mata), Osteochilus hasselti C&V (terbul), Oreochromis mossambicus Peters (tilapia), Oxyleotris marmorafus Bleeker (Ketutu), and Mystus nemurus C&V (baung). Mystacoleocus marginatus was the most dominant species, comprising 64.6% of the total number of fish sampled, followed by H. macrolepidota (24.8%), C. apogon (4.2%), 0. hasseltii (2.6%), 0. mossambicus (1.4%) 0. marmoratus (1.3%), and M. nemurus (1 .I%). Composition and frequency of occurrence of food items iii have been studied. Phytoplankton, insects and zooplankton were found to be the main food items consumed of different fish species in the reservoir. While the least food items were mollusks, juvenile fish and crustaceans. Mystacoleocus marginatus, Cyclochelichthys apogon and Oreochromis mossambicus were largely omnivore at the time they were analyzed. While Hampala macrolepidota, Osteochilus hasseltii, Oxyleotris marmoratus and Mystus nemurus were highly carnivorous at the time they were analyzed. The phytoplankton community was composed of six different groups, (chlorophytes, cyanophytes, bacillariophytes, crysophytes, euglenoids and dinoflagellates) with a mean total density of 20.41 X lo4 cells ml-I. Among the six groups, chlorophytes was the most dominant with a mean density of 64,806.40 cells ml-I, followed by bacillariophytes (51,836.28 cells ml-I); cyanophytes (48,916.48 cells d l ) ; dinoflagellates (24,943.25 cells ml-I); crysophytes (1 1,387.68 cells ml-I) and euglenoids (2,189.59 cells ml-I). On the other hand, the zooplankton community consisted of three groups, namely, copepods, cladocerans and rotifers. Zooplankton was dominated by copepods with a total density of 2,701.27 organisms I", followed by rotifers (2,297.40 organisms I-') and cladocerans (7,16.47 organisms I-'). The macrobenthos of Semenyih Reservoir was composed of mollusks, annelids and chironomids, with a mean total density of 13,658.33 organisms/m2. Among these groups, mollusks were the most dominant with a mean density of 11,525.17 organisms/m2; followed by chironomids (1,599.88 organisms/m2) and annelids (533.29 organisms/m2). Physico-chemical and biological parameters of Semenyih Reservoir were also studied. Temperature, dissolved oxygen, secchi disk visibility and pH values range from 27.55-30.00 OC, 6.63-7.33 mg I-'; 50.60 - 99.80 cm; and 6.96 - 7.84, respectively. Nitrate-nitrogen, phosphate-phosphorous, silica and ammonia-nitrogen ranges from 0.09 mg 1-I to 0.15 mg I-', 2.71-5.26 mg I'', 0.2-0.3 mg I-' and 0.06 - 0.24 mg I-' respectively. One concluding sentence about the fish population, Semenyih Reservoir was a mesotrophic body of water.
format Thesis
qualification_level Master's degree
author Dizon Peralta, Eduardo
author_facet Dizon Peralta, Eduardo
author_sort Dizon Peralta, Eduardo
title Food Availability and Stomach Content of Fish Populations in Semenyih Reservoir, Malaysia
title_short Food Availability and Stomach Content of Fish Populations in Semenyih Reservoir, Malaysia
title_full Food Availability and Stomach Content of Fish Populations in Semenyih Reservoir, Malaysia
title_fullStr Food Availability and Stomach Content of Fish Populations in Semenyih Reservoir, Malaysia
title_full_unstemmed Food Availability and Stomach Content of Fish Populations in Semenyih Reservoir, Malaysia
title_sort food availability and stomach content of fish populations in semenyih reservoir, malaysia
granting_institution Universiti Putra Malaysia
granting_department Faculty Agriculture
publishDate 2004
url http://psasir.upm.edu.my/id/eprint/6124/1/FP_2004_9.pdf
_version_ 1783725685840281600

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